Residential interior decoration: Construction project construction. (Projects that need to be approved according to law can only be operated with the approval of relevant departments. The specific operation items are subject to the approval documents or licenses of relevant departments. ) General items: Mechanical and electrical equipment manufacturing: Mechanical and electrical equipment sales; Electrical equipment repair, hardware product manufacturing, metal product sales: General mechanical equipment installation services; General equipment repair; Special equipment repair: Electronic and mechanical equipment maintenance (excluding special equipment); Loading and unloading, manufacturing of industrial textile products: Manufacturing of general components; Processing of mechanical parts and components, sales of mechanical parts and components: Sales of anti-corrosion materials; Sales of special electronic materials, manufacturing of special electronic materials: Manufacturing of electronic components, sales of electronic components and electromechanical components and equipment: Manufacturing of electric facilities and equipment: Wire and cable operation, manufacturing of lighting appliances, sales of lighting appliances: Sales of clothing accessories, technology import and export, import and export of goods, residential water and electricity installation and maintenance services, installation and maintenance of industrial robots. (In addition to the projects that need to be approved according to law, the business activities shall be carried out independently according to law with the business license)